Clearly this is not convenient on a 24 hour basis as I'd like to get on and do things while she naps and my nipples are going to end up tough as old boots. But, she will not sleep for more than 3 minutes if my nipple is not available. She won't take a dummy and doesn't seem to be interested in her thumb and I'm not willing to leave her to cry. How can I break this habit. She's 15 wks btw.